Thanks for reaching out to our Stock team. I did check your account details and noticed that you had Adobe Stock 10 images a month(one-year) subscription which was recently cancelled, however, you still have access to 16 of your remaining credits which should be downloaded asap as the image credits will be forfeited soon.

Also, you have an active Stock subscription (3 images per month) which was purchased on 31st of January 2018. So you have access to your 3 image credits from that subscription.

If I understand correctly, you want to change your Stock subscription from 3 images per month plan to the 10images a month(one-year) plan. In this scenario, the only option would be to cancel your existing subscription and subscribe to the 10 images plan again.